Guard and work-rest mounting



Patented June 2, 1925.

UNITED STATES PATENT OFFICE.

FRANK L. COLE, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TO CANEIDY-OTTOMFG. CO., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GUARD ANI) WORK-REST MOUNTING.

Application filed April 10, 1322. Serial No. 551,038.

1o ZZ fr0/wm t may concern.'

Be it known that I, F RANK L. COLE, a citizen of the United States,residing at Ghicago Heights, in the county of Cook and State ofIllinois, have 'invented certain new and useful Improvements in Guardsand lVork-Rest Mountings, of which the following is a specification.

My invention relates to grinders and similar machines, and has referenceparticularly to the 'instrumentalities whereby a guard for the grinderwheel or operating element of similar machines, and also a rest orsupport for the work to be operated upon, are mounted on the frame ofthe machine.

It 'is usually desirable in grinders and similar machines to provide aguard for the operating element to protect the operator, and aspurchasers frequently do not decide to use a guard until they have hadthe machine for a while, it is important that the machine should beequipped so that the guard may be mounted thereon without difliculty bythe purchaser. -It is also important,

' from a manufacturing standpoint, to simplify the attachment of theguard so as t0 lessen the cost of manufacturing and assembling, and,moreover, it is desirable to provide a mounting which does not addunnecessary expense to machines which are furnished without a guard, orgive such machines an incomplete appearance. It is also desirable tomount the guard so that it may be adjusted, as the wheel or otheroperating element wears, to keep the guard close to the operating faceof the wheel, so that it will not interfere with the placing' of thework in the operating position, and will permit the operator to have aclear and unobstructed view of the work that is being done by themachine. These objects are accomplished in my invention by forming atubular extension ou the frame of the machine around the rear end of theopening in which the rest or support for the work is mounted, therebynot only affording a convenient means for clamping a guard on themachine so that it can be adjusted to properly expose the working faceof the grinder wheel 0r other operating element, but also forming alonger and more substantial bearing for the work rest or support than inmachines of this character heretofore constructed. I prefer to form thismounting' for the guard by casting a steel or other suitable tube in theframe, as by doing so I not only provide a guard supporting tubularextension which does not require turning down or machining, but I also,as the same time, provide a smooth bore opening for the work rest orsupport which does not require boring out or machining.

On the drawings:

Fig. l is a rear View of a grinder embodying my improvements;

Fig. 2 a. sectional View on the line 2-2 of Fig. l; and

Fig. 3 a fragmentary front view of the grinder showing the rest orsupport for the work.

Referring to the drawings, the reference numeral l indicates thesupporting standard of the machine, which may be of any suitable typefor bench or floor mounting, and has a yoke portion 2 at the upper endsupporting spaced lbearings 3 with pulleys i therebetween on the shaft 5which is journaled to rotate in the bearings 3. The shaft 5 isconstructed at the outer side of one or both of the bearings 3 to havegrinder wheels 6 or other operating elements mount. ed thereon, forperforming the particular work which is required of the machine.

Itis customary to provide machines of this character with rests 7 tosupport the work in position to be operated upon by the wheel 6, saidrests being of various forms as desired and adjustably supported so thatthey may be located in different positions of adjustment. In myconstruction, I

mount the rest 7 on a shaft 8 which is adjustably secured in' an openingextending through the adjacent arm of the yoke 2 from front to rear ofthe machine, said opening being preferably provided by casting a steeltube 9 in each arm of the yoke 2 in a manner well-known to foundrymen.By using a steel tube and casting it in the frame of the machine, I notonly secure the tube permanently in place in the frame, but also providea smooth opening for the shaft of the work rest and avoid the necessityof boring out this opening in the frame. The frame of the machine isformed with a hub portion l0 around the tube 9, and this hub portion aswell as the tube, is drilled at the outer side to provide an aperturewhich is tapped to take a set screw l1 for clamping the shaft 8 of therest in the opening of the tube, and the tube projects ,at

the rear of the machine beyond the hub 10 as shown in Fig. 2, so as tovform a long bearing for the shaft 8, and also aiord a mounting for 4aguard for the adjoining Wheel 6. The guard, Whlch 1s shown at 12,'

ofthe tube 9. lVith rthis construction the guard may be adjusted`a.\:ially along the rear projecting portion of the tube 9 and by reasonof this adjustment the front edge ot the guard may be positioned closetothe Working face ot' thewheel so that it will not interferewith theplacing ofthe work in the operating position and will not obstruct theoperators view of the Work.r

lhile I have shownV and described my invention ina preferred form, I amaware that various changes and modifications may be made Withoutdeparting from the principles of my invention, the scope 'oi' which isto be determined by the appended claims.`

I claim as my invention:

1. In a machine of the class described, the combination of a `framehaving an operating element mounted thereon, and means arrangedco-axially on the trame and supporting respectively a guard for theoperating element and a rest for holding articles in-position to 'beoperated upon by said element.

2. In a machine of the class described, the combination of a framehaving an operating element mounted thereon, mea-ns on the frame havingexternal andinternal supiortin" ortions a 0ruard for the o )eratinfr It5 7 C 5 element mount-ed on one of said portions, and a rest mounted onthe other portion for holding articles in position to be operated uponby said operating element.

3. In a machine of the class described, the combination of a framehaving an operating element mounted thereon, a projection at one side ofthe frame having an opening leading thereunto from the other side of theframe, a gnardfor the operating' element mounted on the projection, anda rest mounted in the opening for holding articles in position to beoperated upon vby said operating element.

4. In a grinder, the combmation of a lrame having a grinder Wheel]ournaled thereon, said; Aframe being provided with an aperture and atubular extension at one end of the aperture, a :guard for the grinder'Wheel mounted 011 the tubular extension,

`and a rest mountediin the aperture forholding articles in position tovbe operated upon bysaid grinder Wheel.

5. In a grinder', the combination of a frame, a grinder Wheelr journaledthereon, a cylindrical extension at one'side ot the trame lia-ving anopening therein extending through the frame, and a- Work'restand agrinder wheel gua-rd mounted for independent adjustment at oppositesides of the trame, in the opening and on thecylindrical extensionrespectively. Y

6. In a grinder, the combination `of a standard having.` a yoke eliapedI,portion `atthe top with-an aperture extending through one of the armsof the yoke, a `bearing in each arm ofV the yoke shaped portion, a

shaft journaled in saidlbearings andV having a grinder wheel mountedthereon, a rest adjustably secured in the aforesaid aperture for holdingarticles in position 4to be voperated upon `by said Igrinder wheel, atubular extension on saidarm, at the rear endvof theaforesaidvopeningvand a grinder wheel` guard clamped on said tubularextension.

7. In a grinder, the combination of a frame having an operating elementjournaled thereon, a tube having one end .secured in the frame, aA guardfor the operating element supported on the other end of the tube, and aWork rest Ahaving a!V supporting stem extending into the tube, and

FRANK L. COLE.V

